(19)

(11)

EP 0 566 682 A1

(12)

(43) Date of publication: 27.10.1993 Bulletin 1993/43 (21) Application number: 92904603.0 (22) Date of filing: 20.12.1991

(51) International Patent Classification (IPC):  C08F 290/ 00( . ) C08F 299/ 00( . ) C08F 291/ 00( . ) C08G 81/ 00( . ) (86) International application number: PCT/US1991/009618 (87) International publication number: WO 1992/012190 (23.07.1992 Gazette 1992/19)

(84) Designated Contracting States: BE DE ES FR GB IT NL (30) Priority: 27.12.1990 US 19900634846 (71) Applicant: EXXON CHEMICAL PATENTS, INC. Linden, NJ 07036-0710 (US)	(72) Inventors: TSE, Mun, Fu Seabrook, TX 77586 (US) DIAS, Anthony, Jay Linden, NJ 07036 (US) MEKA, Prasadarao Seabrook, TX 77586 (US) MCELRATH, Kenneth, Odell B-1410 Waterloo (BE) (74) Representative: Veldhuizen, Albert Dirk Willem, et al  Exxon Chemical Limited Exxon Chemical Technology Centre PO Box 1 Abingdon Oxfordshire OX13 6BB Abingdon Oxfordshire OX13 6BB (GB)